현장유출영상을 활용한 표면영상유속계(SIV)의 상관계수 분석

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김용석;양성기;김동수;김서준
Kim, Yong-Seok;Yang, Sung-Kee;Kim, Dong-Su;Kim, Seojun

  • 투고 : 2015.01.22
  • 심사 : 2015.04.13
  • 발행 : 2015.04.30

초록

This study is daytime and nighttime runoff image data caused by heavy rain on May 27, 2013 at Oedo Water Treatment Plant of Oedo-Stream, Jeju to compute runoff by applying Surface image velocimeter (SIV) and analyzing correlation according to current. At the same time, current was comparatively analyzed using ADCP observation data and fixed electromagnetic surface current meter (Kalesto) observed at the runoff site. As a result of comparison on resolutions of daytime and nighttime runoff images collected, correlation coefficient corresponding to the range of 0.6~0.7 was 6.8% higher for nighttime runoff image compared to daytime runoff image. On the contrary, correlation coefficient corresponding to the range of 0.9~1.0 was 17% lower. This result implies that nighttime runoff image has lower image quality than daytime runoff image. In the process of computing current using SIV, a rational filtering process for correlation coefficient is needed according to images obtained.

키워드

Surface Image Velocimetry;CCTV;Kalesto;Doppler radar;Surface velocity

참고문헌

  1. No, Y. S., 2005, Development of river discharge measurement technique using image analysis, Ph. D. Dissertation, Myoungji University. Seoul, Korea.
  2. Joo, Y. W., Kim, S. J., Yu, K., Yoon, B. M., 2009, The accuracy analysis of SIV(surface image velocimetry) associated with correlation coefficient, J. Korea Water Resources Association, 1894-1897.
  3. Kim, S. J., 2008, The accuracy anlysis of discharge measurement technique using surface image velocimetry, M.Sc. Dissertation, Myoungji University. Seoul, Korea.
  4. Kim, Y. S., Yang, S. K., Yu, K., Kim, D. S., 2012, Flood runoff measurements using surface image velocimetry, J. Environmental Sciences, 22(5), 581-589.
  5. Kim, Y. S., Yang, S. K., Yu, K., Kim, D. S., 2012, Flood runoff calculation using disater monitoring CCTV system, J. Environmental Sciences, 23(4), 571-584.
  6. Yang, S. K., Kim, D. S., Jung, W. Y., Yu, K. K., 2011, Analysis and comparison of stream discharge measure-ments in Jeju island using various recent monitoring techniques, J. Environmental Sciences, 20(6), 783-788. https://doi.org/10.5322/JES.2011.20.6.783
  7. Yang, S. K., Kim, D. S., Yu, K. K., Kang, M. S., Jung, W. Y., Lee, J. H., Kim, Y. S., You, H. J., 2012, Comparison of flood discharge and velocity measurements in a mountain stream using electromagnetic wave and surface image, J. Environmental Sciences, 21(6), 739-747. https://doi.org/10.5322/JES.2012.21.6.739
  8. Yang, S. K., 2007, River management and improvement of Jeju island, J. Korea River Association, 3(4), 401-115.
  9. Yu, K., Kim, D. S., Yoon, B. M., 2005, Development of fast and exact FFT algorithm for cross-correlation PIV, J. Korea Water Resources Association, 38(10), 851-859. https://doi.org/10.3741/JKWRA.2005.38.10.851

과제정보

연구 과제번호 : 제주형 물순환 해석 및 수자원 관리 기반 구축 연구

연구 과제 주관 기관 : 국토해양부